Tube sheet for boilers



May 14, 1935. J SMITH 2,001,333

TUBE SHEET FOR BOILERS Filed July 25, 1934 2 Sheets-Sheet 1 I l I 3 N r *1 I I I ooooqgopeeeee o I n l h I v N a I u I I I I I p I I I I I x I I I [III] 1 Ill/I Inventor By @Mwih fl Home y May 14, 1935. J -R SMITH I 2,001,333

I TUBE SHEET FOR BOILERS Filed July 25, 1934 Sheets-Sheet 2 'IIIIIIIIIIIIIIIIIIIIII 1111111111111111111111111111 lnvenior pwm r, Ilomey Patented May 14, 1935 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a tube sheet for boilers, the general object of the invention being to so form the sheet that it can expand and contract and thus accommodate itself to the contraction and expansion of the tubes without damage vto the tubes and also to give the sheet more tube area.

This invention also consists in certain other features of construction and in the combination and arrangement of several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawings where in like characters denote like or corresponding parts throughout the several views, and in which:

Fig. 1 is a longitudinal sectional view through a boiler constructed in accordance with this invention.

' Fig. 2 is a section on line 22 of Fig. 1.

Fig. 3 is a front view of the tube sheet.

Fig. 4 is a fragmentary transverse sectional view through the sheet.

In these drawings, the letter A indicates a portion of a boiler and the letter B indicates a portion of the fire-box, the usual stays I being located between these parts. In carrying out my invention, I provide the tube sheet 2 with a flexible flange 3 which provides an outwardly bowed "part 3, an outwardly straight part 4 which merges into one limb of an inwardly extending U-shaped part 5, the other limb of said U -shaped part being bent to provide the attaching flange 6 which is riveted to the rear end of the fire-box by the 5 rivets 1. The tubes are shown at 8 with their ends passing through holes in the sheet 2 and attached to the sheet in the usual or any desired manner.

Thus, it will be seen that as the tubes contract 10 and expand, the flange of the tube sheet will also contract and expand so that the sheet will accommodate itself to the movements of the-tubes. This form of flange increases the tube receiving area of the sheet.

- It is thought that from the foregoing description, the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

I claim:

In a boiler, a tube sheet having a spaced 'reentrant flange joined marginally thereto by an outwardly curved portion, said re-entrant flange terminating at its inner edge in an outwardly disposed U-shaped portion having a lateral attach: ing flange extending from the free end thereof.

JOSEPH R. SMITH. 

